Improvement in wood-turning lathes



UNITED STATES PATENT OEEicE.

HARVEY LOCKE, ASSIGNOR TO JOHN J. MCNUT'I, OF BOSTON, MASS.

IMPROVEMENT IN WOOD-TURNING LATHES.

Specification forming part of Letters Patent No. 49.035, dated July 25, 1865.

To all whom it 'may concern:

Be it known that I, HARVEY LocxE, ot' Boston, in the county ot' Suffolk and State ot' Massachusetts, have invented a new and usel'ul Improvement in Machines for Cutting Rope or Twist Molding; and I do hereby declare that the following is afull, clear, and exact descrip'- tion ot' the construction and operation ot' the same, rel'erencebeing had to the accompanying drawings, forming a part ot' this specitication, iii wliieh- Figure l is a front elevation. Fig. 2 is a side view. Fig. 3 is an enlarged plan of a single set of the oppositely-revolving cutters. Fig. 4 is au enlarged detached plan of the revolving feeding-apparatus. Fig. 5 is an enlarged detached plan of the feed-rolls. Fig. 6 is a longitudinal section through the shaft of one ot' the cutters and its bearings in the line av a: otl Fig. 3. Fig. 7 is an enlarged side elevation ot' one ofthe cutter-wheels. Fig. 8 is an enlarged side view ofthe rotating clamps, and Fig. 9 is a front elevation ot' the same.

Like parts aieindicaled by the'same letters in all the drawings.

The nature ot' my invention ci'isists, first, in the employment of a stationary bevel-gear wheel, W, in combination with arotating pinion, X, on the rotating hollow spindle V, for actuating the feed-rolls D D', by which the molding to be cutis fed along; second, in the employment ot' an adjustable clamp, K', and a spring-clamp, E, ruiming through the hollow spindleV, so as to hold the material close to the rotary cutters to keep it from chattering; third, in the employment ofltlie adjustable clamps M and N in front ot' the cutters to hold the molding after it is cut, or as it passes through, and thus prevent it from trembling; fourth, in making the cutters adjustable toward and from the center of the spindle, so as to out moldings ot' different diameters; fifth, in making the feed-roll Dl in two parts, or with a central groove around it, so as to take hold firmly of each side of the corner of the stock to be out; sixth, in confining the cutters d to the Wheels O by means of a dovetail and clamp inside of the circle described by the edge of the cutters; and, seventh, in constructing the nuts c with a flange extending into the boxes of the cutter-shafts, so that as they (the nuts) wear od onv their inner ends the said ange may be shortened by tiling, and thus prevent the opposilely-revolving cutter-wheels O O from coming in contact or vibrating.

To enable others skilled in the art to make and use my improvement, I will now proceed to 'describe the construction and operation ot' the saine.

A A are the two ends of the frame, united by the rods C C and table B.

D is the main driving-shaft, turning in suitable bearings in the ends of the frame.

E is a large pulley fast to the shaft D, and F is a belt passing from said pulley round the three pulleys G G G ot' the series of cutters, as clearly shown in Fig. l, l? being a pulley whose axle runs in the end ot' the adjustable arin Q, which is provided, as shown in Fig. l, with a longitudinal slot, and is held in any required position by means of the `screw b, the object ot' said pulley being to tighten the belt F as the arms E(y are adjusted for different sized moldings.

I employ three sets ot' double cutting-Wheels, O, arranged one hundred and twenty degrees apart, around the hollow spindle V, in front of the traine A, as clearly shown in Figs. l and 2. As these three sets, with their appendages, are all alike in construction and operation, a

description ot' one will answer for all.

H is an arm, the inner end of which slides in a corresponding inortise in the front of the frame, so that, with its appendages, it may be set nearer to or farther from the spindle V, being held in place by means ot the set-screw a, which passes through a longitudinal slot in the frame into said arm. At right angles 'to the outer end of this arm H is a box, in which revolves the axle I of the pulleys G and J J.

Attached to the inner end of the arin H is a frame, L, (an enlarged top view of which is shown in Fig; 3,) to form the bearings of the axles R R of the cutter-wheels O O. These wheels are made of cast-iron, shaped as shown in Figs. 3, 6, and 7, and fast to the contiguous ends of the axles R It, so as to run as near together as possible without actual contact. These wheels O O are driven in opposite directions by means of the crossed bands or belts K K passing over the pulleys J and N.

c is a nut screwed onto the outer end of the axle R, being provided with a flange which enters the box of said axle, as represented in Fig. 6, so that in case the parts should ever Wear enough to cause the two wheels O 0 to vibrate or come in contact they can be tightened by tiling a little off ot' the said flange on the nut.

The cutters d are formed of the sections of a ring turned to the requisite shape for cutting the moldings,and having adovetail tenon on the inner side to tit into a corresponding mortise in the side ofthe wheel O, to which it is securely confined by means ot' the clamp e and screw f', as clearly shown in Fig.

V is a hollow spindle, through which the square strips ol' Wood to be cut into spiral or twist or rope moldings is fed. This spindle turns on the bearing-points h and g in suitable boxes in the two ends of the i'rame, being driven by means ot' the pulley U and belt T, which passesover thesmallrr pulley S, fast upon the driving-shaft D. Through the center of this spindle V is a square hole. (Shown in Fig. 1.) Arranged in tuo opposite corners ot' this square hole are the adjustable clamp K' and spring-clamp E', the general shape ot' which is clearly shown in Figs. 8 and 9. The clamp K' is contlned in the spindle V by means ot the set-screws il t', the t'ront end ot' the same projecting beyond said spindle, as shown in Figs. 4'and S. The clamp K' may be adjusted at any required distance from the center of the spindle by means ofthe screws L' L', ns shown in Fig. 2. 'l'he clamp E' is also u spring, having its bark end attached to the spindle by means of the pivot F'. More or less pressure may be given to said clamp by means ot the screw G'.

Fast to the inner end ot' the frame, as shown in Fig. 2, is a bevel-pinion, W, which actuates another bevelpinion, X, fast to the axle Y, and turnipg t'rcely in a slot on one side of the center ot' the spindle V, as shown in Fig. Il. Z is a smaller pinion t'ast to the outer end of the axle Y. A' is a larger pinion engaging with the pinion Z, and fast to the outer end of the shaft B', which latter turns in the free ends of the arms or links U C', one ot' said links turningron the pivot-pin J' and the other on the axle Y.

Fast to the axle B' are the toothed feeding- Wheels D' D', which are arranged a little distance apart, as shown in Fig. 5, so as to take fast holdy of the square. strip of wood to be fed through the spindle. Each side ot' one of the corners` 1)' D' may be either separater Wheels, or a single wheel with a groove around the center.

H' is a slotted spring, one end of' which is attached to the spiudleVby means of the pivotscrew F', the opposite or forked end resting on the shaft B', each side ot' the Wheels D', as represented bythe dotted lines in Fig.4. More or less pressure may be given to the spring H by means ofthe screw I, so that the wheels D may bear more or less upon the stock that is being t'ed through, the spindle, as may be required.

N' is a clamp or guide attached to an arm in front of the frame by means of the pivotscreW O. The shape ot' this clamp is clearly shown in Fig. V1, the lower end'being provided with a slot, through whichis passed the screw Q', by means ot' which the clamp maybe readily1 adjusted and set in any required position. M' is another clamp or guide, the size and shape of which are clearly shown in Fig. l, being confined to the front ot the franie, in the same manner as the clamp N', by mea-ns ot' a pivotscrew, O'. The distance between the upper ends ot' these clamps is regulated by means ot' the screw P', which passes through the lower end ot' M' against the lower end ot' N'. The object ot' these clamps has been described above in setting forth the nature of my invention.

Having thus fully described the construction and operation of my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The combination of the stationary bevelgear W, rotating pinion X, hollow spindle V, pinions Z and A', links C' G', and feed-wheels D D', substantially as and for the purpose described.

2. The adjustable clamp K' and clamp E', substantially as the purpose described.

3. The adj ustableclampsll/I'aud N',arranged substantially as and for the purpose described.

4. So arranging the feed-rolls D D' as to bear on each side of the corner of the square stock to be cut, substantially as and for the purpose descri bed.

5. Contining the cutters d to the wheels O by means of a dovetail and a clamp and screw inside of the circle described by the edge ot' the cutters, substantially as described.

springset forth, and for H ARVEY LOGKE.

\Vitnesses:

N. AMES, HENRY F. SHAW. 

